Valve-seat seal cap



March 30 1926. 1,578,452

J. F.MGARRAHAN VALVE SEAT" SEAL CAP Filed May 23, 1924 'To all whom it may concem:

Tess TENrPoFFI CEJ JOHN F. MCGARRAHAN, or RIVERSIDE, ILLINOIS, As's'IGNon To ATLAS can coMrANY,

,' or GENEVA, ILLINOIS, A

conronar'ron 01: tumo s.

I VALVE-SEAT SEAL' oar.

Be it known that I, JOHN HAN, a citizen of the United States, residing at Riverside, in the county" of Cook, State of Illinois, have" invented certain new and useful Improvements in Valve-Seat Seal Caps, of which the following is a description, reference being ha-d'to the accomv pan'ying drawing and to the figures of reference marked thereon.

The invention relates to new and useful improvements invalve seat seal caps for metal'contamers, and more particularly for spring caps of the screw thread type;

In the patent heretofore issued to me on the 23d day, of May, 1922, No. 1,l17,841, I- have shown, described and claimed a cap having a depending portion extending down over the top portionofthe container, the two having interengaging means, such as screw threads, for holdingthe cap on the container body, the said cap having a central indented portion of' less diameter than the opening into the container and having an annular channel disposed above an inwardly extending flange on the container body combined with a sealingdisk, whereby, when the cap is secured on to the top, the indented portion of the cap oper ates to force the sealing disk into the open inner edge of the flange in the sealing disk to form a tight seal.

The present invention, as above stated, presents several features over the patent mentioned in that thecentralportion'of the top is not indented, but is provided witha concave annular bead, the main flush with the upper edge of the cap" top, whereby a long surface for the application of a solder for the attachment of a spout to the can top maybe provided.

Another feature of difference vis: that the said annular bead doesfnot extend into the can top opening, and therefore, when a seal-.v

ing disk is notrused, a positive metalto metal contact isassured, which is not true By tlllS arrangement.

on indented caps. also, when the cap without insert is tightened, on the top, sealingifiange is body of the central portion being,

the inward edge of the bent downwardly and a 5 ring action between the flange and'eap- 1s Application filed May 23, 1924, serial no. 715,413.

Again whe'n a sealing disk is inserted and thecapi's tightened in "the can body,

theinward edgeof thetop :is bent downwardly and a rounded V-shapedsealing bead'is formed at the outer annual edge of the flange, this edge beingimbedded i'n the sealing disk. 7 I r Furthermore, this feature of usingthe annular bead, bearing first on the flange and then bending the burr edge"downwardly and away from contact with the sealing gasket prevents the f formation of j leaks which, in the previous form of can top' were likely to be caused because of the danger of cutting the inner sealing edges "by the burr formed at the inner edge of the sealing flange I The inventl matters lrereln'afterdescribed and referred on, therefore, consists in the to in the appended claims, constituting the.

improvements on the said above mentioned patent.v In the'acco-mpanying drawings which. illustrate the invention-,

metal 1 container provided withi double spring seali-ng'cap constructed in accordance with'my invention, and showing the sealin'g disktherei'n;

Fig; 2's a sim'lar view "SlIOWlIlg' the 're-' neonr the parts after the cap has been secured'into position; V

- Fig.3 is a. view similar to Fig.-: 1

the'sealin'g disk'o'mitted;

Fig. 4;: is a view similar the sealing diskomitted; Fig. 5 represents the can pouring spout attached thereto.

Referring in d tail. to the drawings,'-I

. with have shown in Fig; 1' a'metal container '1,

having the mouth or top. po-rtion2' thereof of smaller diameter than the body, this mouth portion being'formed with a screw .thread.- For closing the container, I have "provideda metal cap 3 formed with a ,de-' pending flange 4, extending down overthc top *portion and having a' screw T thread thereinadapted to engage with the screw thread onthe mouth of the container, and having an annular bead 6- in its under surface.- I 1 *At the mouth of the 'conta-iner there is an inwai'idly projecting ailge 5,- horizontal, as show-nin Fig; 1., "Between the beads-and V Figure 1 1s a front view in section of I I to Fig. 2, with top, with a V the edge of the top-af-channel is thus Q formed which is less in width than the fro lead.

flange 5. Y

Located within the cap is a sealing disk whichfpreferably consists of a' padding 7, having a facing of some-soft metal, such as The sealing disk; is of substantially the'same diameter as the internaldiameter ofthe cap, or' slightly greater than thesintern a1 diameter, so as to be frictionally fgrippe'd and, l1eld ,-within the. cap.' When ,manufacture' of contamers having an 1nsaid disk is placed in the cap, it is substantially flat and unbent, as-shown in Fig; 1.

lVhen the cap is screwed'onto the container, the annular bead or rib 6 'is imbedded in the sealing disk, as shown in Fig.

2, and the flange 5 yields to the pressure of I vcap or such sealing disk as maybe used, re: 1 sulting in leakage. Accordingto'the present securing the top onto the vcan -bo dy,,,the

I sealing diskis, dished slightly downwardly,

as shown in Figure 2, anda secure and. complete sealing is accomplished.fits the'an @nular rib or bead is so'located on the cap,

as to be in aplane between the inner edge of the flange 5Vi. e., the channel 10 is narrower than theflange 5 and thebodypora tion 2, it may as shown in Figs' 3 and v 4, be used without a sealing disk and a tight metal tometal seal be made.

hen the cap carrying the gasketis screwed tightly onto" the flange, it deforms V the latter and the movement effects a grind-s ing action between the flange and gasket, thus resulting 1n a ground conical valve seat.-

,As. shown in Fig. 5, by the use of the 1 annular bead 6, the" upper surface of the features of the pointed out.

cap 3 does not have to:be dished inwardly, but may be left in the same plane with the outer periphery, and, therefore, affords an extended flatisurface'for the attachment ofthe usual oil or insecticide'spout andcap 9, which in use sometimes accompanies such container. V

'By way of recapitulation,theffollowing present invention may be lVhenthe cap 3 is usedwithout the' seal ing disk 7, the annular bead '6 of said cap "will-engage the upper surface of the flange;

5 of the container intermediate of the inner A positive annular metal to metal contact will be" had between said bead'andthe upper surface. of said flange; When the cap'is screwed down upon the container, said bead 6 will bend the flange downwardly, and a spring action betweenithe flange andcap is effected. The bead 6 will grind itself in a conical seat against the eonically shaped 'flange'5iis straight in cross section, having 'no. crimps, or beads, or othenreinforcing conformation, to prevent deformation.

Said downward bending, as clearly shown in Figures 2 and 4, produces a rounded V- shaped ,sealing bend at the'outer annular edge of the sealing flange 5. The outerperipheryjof the flange 5 will when thesealing disk 7 is provided, create a distinct in pressien in'said sealing dsk and effect a pos tive seal at this region of contact.

is danger that when the cap is screwed down to its home position there will be a cutting action between said burr and either said invention no such action "is possible, however, inasmuch as the force in bending down the flange 5is applied not at the inner periphery of said flange 5 but ataregion'between the j inner and outer peripheries of said flange. The inner periphery carrying the burr edge is, therefore, bent;clownwardly,.

away from contact with? the cap 3 and Scaling d1sk7.

. In cases wherein the sealing disk I is used,

the annular head on thetop of the cap 3' produces an annular compression or compact, thereby effectmgan added seal by preventing leaks due to seepage.

" By reason of the conical seat seal provided, leakage from the container is eifec tually prevented, it being possibletoefl ect a tight contact between the eonicalsurfaces. The conical seal 'iseffective also forizthe reason that seepage would in the normal position of the containers have to s-occur against the force of gravity.

'It will be noted that fluids inorder to escape from the container'embodying the principles of the present invention must.

escape 'pastthe metal toQmetal fitof the head? of the 'cap againstthe flangegf) ofthe container. sealing rings formed whenthe metal of the It must also pass through the beads3 of the sealing disk 7 is ground to a seatron the conical flange ,7, and mustwork' uphill, and finally must pass through'the compact effected by; the bearing of the bead 3 upon the'sealing disk 7.

lVith the beaded capv as disclosed, the

center portion of; the top, raised to the same level as the outer edge of the cap,

fills in most of the space centrally of the top of said cap and greatly minimizes the time I I I A and labor cost of attaching the spoutO to flange 5, producing a number of sealing 7 rings. As clearly shown in the drawing, Said said cap. The quantity, of solder required is substantially reduced, and astronger and better combination of spout-and'cap re;

"sults. 7 f

I claim as new and desire to secure by Let tcrs Patent,is:

1. A container having .ancopening, a deformable annular flange, straight in cross section, defining the boundary of said opening, and a closure for said container, said closure being provided with an annular bead adapted to exert force against said flange at a region spaced slightly from the boundary of said opening and adapted to bend said flange inwardly to provide a conical seat. 1

2. A metal container having a screw-- threaded portion providing an opening, said portion being providedwith a deformable flange, straight in cross section, bounding 7 cross section, bounding said opening, and a spaced "from the free edge of said flange.

cap adapted to be forced into holding on gagement with said portion, said cap being provided with an annularbead adapted to exert force against said flange ata region 4. In combination, a container'having aortion )rovidin an o aenin 'said )ortion w being provided 'Wlth adeforinable annular flange, straight in cross seetion,.l1aving a free edge, and a cap having holding engagement with said portion, said cap having a substantially flat top but being provided with an annular bead adapted to exert force against said flange at a region spaced slightly from the free edge of said flange 5. In eonibination,a member providing an opening, said member having a deformable,

flange, straight incross section, bounding said opening, said flange having a free edge, and a closure having holding engagement.-

with said portion, said closure being provided with an annular bead. adapted to exert force against said flange at a region spaced slightly from saidvfree edge.

6. In con'ibination, a member providing an opening, sa'id'member having a deformable flange, straight in'cross section,

a closure having holding engagement with said portion, said closure being provided with an annular bead adapted to exert force against said flanges-at a region spaced slightly from said free edge, and a compressible sealing member within said closure between said bead and said flange.

In testimony whereof,

I a'fflx my signature.

bounding said opening, said flange having a f1eeedge,1'

Jo -Iu-F. MOGARRAHAN, I 

